HUE028625T2 - Hose clamp - Google Patents

Description

[1| An open tee damp, In which both end portions of the damping band have toothed sections for mutual engagement In the overlapping condition, is known from US 4,053.9öS. In order to hold the end portions in engagement, It is consid ered to provide a dip or the like, which is not explained in detail. |2| US 3,078,532 discloses such a dip which surrounds like a ring both ends of a damping band which In this case is toothed throughout. Such a ring-shaped dip constitutes an additional structurai part, which may be lost and which renders the mounting process more difficult. Moreover, the dip prdects from the Interna! surface of the damp and Is therefore problematic with regard to the tightness of the connection. |3| US 1,804,725 discloses a having a clamping band the ends of which, in the mounted condition, form mutually overlapping end portions having toothed sections at mutually facing surfaces, and; retaining means holding the toothed sections in mutual engagement, wherein the toothed section of a first end portion is formed at the outer side of a first tongue, which has a width smaller that the full band width, and the retaining means has a raised portion formed in the second end portion, the raised portion carrying at its inner side the other toothed section and forming an opening facing in the circumferential direction 1er passing the ifst tongue. One of the toothed sections is provided on the outer side of a tongue, the other on the Inner side of a raised porion which has an opening for inserting the tongue in the circumferential direction of die clamp. The raised portion has a web which forms an inner iimiatien for the inserting opening and lies between the tongue and the hose to be damped. The web constitutes an unevenness at the inner side of the hose clamp facing the hose and is, therefore, suited for relatively thick end soft hoses only. The web also creates a spacing between the tongue and the hose, which must fee overcome when the clamp Is tightened, |4|; In the known hose clamp, the tongue is toothed also at its underside so that considerable fnotional forces occur upon tightening, which tend to entrain the hose Oimumferentialy, Deformations caused thereby In the hose can lead to leaks between the hose and the underlying object such as a nipple.

Summary of the invention [5] it is the object of the invention at least in part to overcome shortcomings as occur with comparable prior-art hose clamps, Λ more specie object of the invention may be seen to reside in a hose clamp which is easy to close and tighten and which has a smooth internal surface throughout its cimumferenes to reduce the danger of leaks, |8J This objet is met by the hose clamp defined in claim 1. There, the tongue which is toothed on its outer side extends through an aperture that Is formed in a step existing In the other end portion of the damping band, This avoids the clip or web required In the prior art, thereby enabling a smooth internal surface free of prelections and gapsthroughout the circumference and avoiding leaks, [7] Tie embodiment of the invention In accordance with claims 2 and 3 results in that no gap can occur under the raised portion in fie tightened condition of the clamp so that the hose Is pressed against the underlying object also In this area, and leaks are avoided, [8] In the embodiment of the invention according to claims 4 and i, any gap is avoided at the end of the clamping band portion provided with the raised portion thereby removing the risk of leaks also at this point.

[9j The feature of claim 8 provides a lateral guide of the Inner clamping bend end in such a manner that this end is prevented from escaping laterally at the time the clamp Is closed and tightened. The structure set forth in claim 7 permits the clamping band ends to hook into one another In the not yet tightened condition, thereby facilitating the engagement of a tightening tool |'10j In the embodiment of the hose clamp according to Claim 8, the bghtaning condition of the hose damp may be vlsuaiiy detected. p i] The structures according to claims 9 to 13 are useful for engaging a tight* ening tool which may be shaped as a pair of pliers. The structure according to claim 11 ts particularly suitable in that it reduces the risk of the hose being damaged by the tightening tool. In the embodiment of claim 1¾ one of the tightening means simultaneously cats as a protection against buckling, in the further embodiment of claim 13 sise as a stop for limiting the ciosing movement.

[12] The embodiment of the hose clamp In accordance with claim 14 is partlcu-lerly suited for airbags, wherein the apertures provided In the inner damping band portion effect an anchoring In the airbag material.

[13] The embodiment of the hose clamp in accordance with cialm 15, the hose damp is suited for tightening means using a worm gear.

Brief Description of the Drawings |141 Embodiments of the invention wifi described in more deleit below with reference to the drawings, in which:

Fig. 1 Is a perspective view of a hose damp in accordance with a tiret em» bod imént shown in its closed but not yet tightened condition;;

Figs. 2 and 3 are a perspective view and, respectively» <$ side view of the hose clamp of Fig, 1 m Its straight condition;

Fig. 4 is a side view of the hose clamp of Fig. 1 in its closed but not yet tightened condition;

Fig. 5 Is an enlarged view of a portion of the hose damp shown in Figs. 1 to 4; Fig. 8 is a plan view of the tongue of tie hose damp In accordance with accordance with another variation;

Fig, 7 is a perspective view similar to fig. 1 of a hose damp In accordance with a second embodiment shown in its dosed but not yet tightened condition; Fig, 8 is a perspective view again similar to Fig. 1 of a hose clamp in accordance with a third embodiment shown in its dosed but not yet tightened condition;

Fig, 8 Is a perspective view similar to Fig, 2 of the hose clamp of Fig. 8 in its straight condition; and

Figs, 10 and 11 are side views of the hose damp of Figs. 8 and 9, shown In its dosed but not yet tightened condition. IFmbodtnienfs [15] The hose damp shown in Figs. 1 to 4 consists of a damping band 18 the first end portion 11 of which terminates in a first tongue 12 having a width smailer than the full width of the clamping band 18. The second end portion 13 has a raised portion 18 spaced from the free end 14 which, as viewed from the end 14, starts wit an outward projecting first step 11 and terminates with an Inward returning second step IT which is symmetrical to the first step IS, The height of the steps IS, 17 is substantially equal to the thickness of the damping band 10. The first step 18 has an aperture IS and the second step 1? has an aperture 19 for passing the tongue II, Fig. 1 shows the hose damp in a pre-bent, dosed but not yet tightened condition in which the tongue 12 extends through the apertures 18 and 19. 118j The outer side of the tongue 12 is provided with a toothed section 28 the teeth of which are shaped like saw teeth having one side substantially perpendicular to the hand surface and one inclined side which faces the tip of the tongue 12. The surface 21 of the tongue 12, which Is the radially inner surface \s»th respect to the curved dose clamp, Is smooth.

[1 If As shown in Figs, 3 and 4, the second end portion 13 has a toothed sec»· tien 22 at its inner surface within the raised portion IS. The liefh of the toothed section 22 are also saw-tooth shaped having one side substantially perpendicular to the hand surface end one inclined side feeing; the fee end 14, The pitch of the teeth of the toothed section 22 may he twice or a multiple of that of the teeth of the loomed section 20 of the tongue 12 If is advantageous to make the pitch of the toothed section 20 of the tongue as small as possible to enable the diameter of tha hose clamp to be brought to the deseed value upon tightening as closely as possible. |1 Sj The hose clamp shown in Figs. 1 to 4 is axially positioned or is opened and placed around the object to be; tightened, such as a nipple surrounded by a hose, whereupon the tongue 12 Is fed through the apertures 18 and 4i with the toothed sections 20, 22 catching end another. During the subsequent tightening, the tobgue 12 moves further through tbs apertures 18. 12. At the same time, the toothed section 22 of the second band end portion 13 between tie steps If and 17 Is pressed against the toothed section 20 of the tongue 12. This prevents unintentional opening of the hose damp. |10J: Tightening can be done by means of a tightening tooi the tightening ele ments of which bear at the second step 17, on the one hand, and pell on the tongue 12, on tile other hand, Alternatively, it is possible to provide recesses at suitable locations of both end portions 11. 13 for engagement of pointed ends of a pair cd pliers, or to provide a tightening hook on the raised portion if for engagement of pliers. |2D| The second end portion 13 of the damping band 10 terminates in a second tongue 24 which is narrower than the clamping band 10. The tongue 24 is received by a channel 28 provided In the first and portion 11 and carries at its outer end a guide hook 28 which is open in the direction of the first end portico 11. As shown in Fig, 4, the guide hook 28, In the closed and tightened condition of the hose clamp, extends through a guide slot 27 which is formed in an outward bent portion; 28 of the first end portion 11 adjacent to the inner end of the first tongue 12 and in an adjacent cover 2S of the channel 28 which is bent outward from the clamping band 10, The cover 2t prevents the tongue 24 from projecting outward from the hose clamp. |21 j In the closed condition, the hose clamp seeks to open due to its inherent tension. This is prevented by the fact that the guide hook 28 catches the end 38 of the guide slot 2? adjacent to the first tongue 12. With the mounted hose clamp being thus retained in its closed condition, the subsequent tightening process may be performed without problems.

[22] fig. 5 shows an enlarged part of the damping bend 15 in the area of the end 31 of the guide slot 21 remote from the first end porion 11. With proper clamp size and tension, the guide hook 28 should be between the marks 32 and 33 provided at in this area. This permits a visual check of the clamp tension.

[23] As shewn in fig. §t and different bom Figs 1 and 2, the toothed section 20 of the first tongue 12 can have teeth extending at an angle to the longitudinal axis of the damping band 10. in this embodiment, the hose damp is suited for tightening means using a worm gear. p4| The embodiment of Fig. ? differs from that of Figs. 1 to 4 in that the second end portion id has the full width of the ciamping band throughout and is provided with a number of apertures ft. This embodiment is suited for, e.g.t air bags where the apertures il may catch in the relatively soft fabric of the air bag. Further, the formations 27,..31 in the fust end porion shown in Fig. 2 are omitted so that the end §2 of the second end portion Si forms a step inside the closed hose clamp, [25] The further embodiment shown in Figs, 8 to 11 differs from those of Figs.. 1 to 8 by a shorter length of the tongues 12 and 24, Further, the raised portion 15 has lateral webs 85 between both slaps 15, IT which, in the closed condition and In the tightened condition of the hose clamp, are disposed on both sides of the tongue 12, The laterally closed cage thus termed Increases the surface pressure exerted by the hose damp on the hose In the area of the tongue 12.

[28] The step 17 may be closed # the first league 12 is short. With greater tongue lengths or to permit larger diameter reductions of the hose clamp, the step is provided with an aperture,: as In the embodiments of figs. 1 to 7, through with the tongue 12 can extend to avoid friction, [27] To tighten this hose damp, a slightly outward projecting tightening tunnel 38 is formed on the part of the damping bend 18 adjacent to the first tongue 12, and an outward projecting tightening hook 37 is formed on the raised portion 15 be» tween the irat and second steps If*. 17 of the second end portion 13. A pliers-type tightening tool may engage this tunnel 38 and hook 37. The tightening tunnel 35 overlaps the step between the first tongue 12 and adjacent part of the clamping band 10 to constitute a protection: against booking, [28] As further shown in Figs. 8 to 11, a nose 35 pressed out of the camping band 10 may be provided on the second tongue 24 at a location further remote from the end 14 of the second end portion 13 than fie guide hook 25. The nose 38, in cooperation with the internal surface of the tightening tunnel 35, prevents an inadvertent diameter reduction of the hose clamp during transport; see fig. 10. |29| As appears form Figs. 10 and 11,. Ida end: of the lightening fennel 3$ remote from the first tongue 12 forme a ledge 3@ which co-operates with an edge 40 of a window 41 cut out of the second end portion 13 to limit the dosing movement, [30] The features explained with reference to Figs, 5 end 8 may he provided also id the embodiment of Figs. 8 to 11, Likewise, features explained with reference to Figs, 3 and 11 for limiting the closing movement and preventing an inadvertent diameter reduction are applicable also to the embodiments of Figs, 1 to 6. Further, the feature explained with reference to Flp, 8 and 11 for increasing the surface pressure exerted on the object being damped is also applicable to the embodiment of -Ftp. 1 to 8. iefirence numbers PI! 1# clamping band 11 first end portion II first tongue 13 second end portion 14 end (of 13} 15 raised portion 18 first step 1? second: step 18,1f apertures 2§ toothed section 21 inner surface 22 toothed section 23 projection 24 second tongue 28 channel 28 guide hook M guide slot 21 bent portion 29 cover 30, 31 ends of the guide slot 32, 33 marking lines IS webs 36 lightening tunnel 3? tightening hook

If nose

If ledge 46 edge 41 window

St second end portion $1 apertures S3 end (of St)

Claims (4)

Patent Claims I »Hose tightening clamp, which consists of a plurality of end sections (11, 13), which are mounted on their ends, and which are equipped with teeth ranges (20, 22) on their upright faces. and has a gripping device that holds the fegasate ranges, 22) a reciprocal caption &amp;n; a first end of the lower end of the first (11) on the side of the first tongue (12) has a kactact; syolf 'sa # &amp; Si | p: i <Ä $ É $ the total tape width% yyyy, the gripping device is a; second: final (13) klaktldmli has a high-pitched tent »y &amp; ««] $ #: · | &Amp; | a. »SS. '^ MiMà ^ t-φ ^ Itfecllja, the first tongue (12) is a flip, sgpl jtem of the first tongue (18), which is an outward opening (18), range (15) is the second stalk (I3 | seabed end) some lava-nourishes with a first step in the first step fii) start with the magassigs and windbreaker (1 (5): the thickness of the thickness! a. and an arrow (14) for sliding the first tongue (12) is a breakthrough (IS) in the first step (16). Ά ő ény ény tt tt tt «« ti:: lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő lő 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17. átlőtésse! provided with a first tongue (12), 3, The hose bristle clamp according to claim 1, wherein the gripping device: on the side of the first strip (shoot) further away from the end (14) of the second strip (1), moves inwardly from the first step (1) and two steps (M, 17) the range between the tilde ridge (35) that is the hollow-sided bite-shaped spine: branch first tongue (1: 2): on two sides: lie on 4; shölá second vegsZátez (13) into a second handle! (24) has a broader, smaller, slanted strand width, while the first section of the yoke (with one channel (25) is arranged to receive the bite tongue (24); (5) is provided with a cover element (29) in addition to a cover element (29), wherein the cover element (29) is provided with a guide (27) with a protrusion extending outwardly in the second language (24). 2h). 7. His. The clamping clamp according to claim 1, wherein the plunger forms a hook (26) falling from the second leg end to engage at the end (30) of the clamp (2?) towards the first belt end. An inlet clamp as claimed in claim 6 or 7, wherein the guides (32, 33) of the guidewire (27) (4) are arranged to provide a visual indication of the condition of the sinusoidal bt lines. % Of the preceding claims, wherein the sapphire is a bite, a. end stage of existence (1 1, 13} means (17,23; 36,37) are used to test a stress test. W. The shot firing bit according to claim 9, wherein the heat-generating means for attaching the tensioning tool are projections protruding outwards (17,23; 36,37) , i., AH) according to claim 1, wherein the protrusions (36, 37} sxnrísösxaiag {10} are located in the parts of the mimescope, in the state of the Mimes, in the language of the rhythm of the rhythm (12, 24). A: 1Ö> Demand family with a titalteprM clamp, aboi 4 -: ^ ÊM ^ y4È bgptfe «first tongue (12) and stairs of the treadmill (lei},} AÁ}. &Amp;,. ibsnstopstop smto € ibsnlfirsthandle, aboi a nybiyaby (3 # one with backrest (391 reassemble xx, balancing the movement of MMC: one of the xssslk's sibling-section: verb edge), 14 \ t yours pond clamp, where the internal puncture ^ isgr # gs2afeasa (§! § is equipped with (51), ISk The previous verb &amp; syp &amp; ntok feámdyike 'smrmü pendulum clamp, bay on the Ibgazoi anonymous p% 22} teeth fera »: faltofc s clamping g (10) vengeance blade.